1805413 has 2 divisors, whose sum is σ = 1805414. Its totient is φ = 1805412.

The previous prime is 1805393. The next prime is 1805473. The reversal of 1805413 is 3145081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1803649 + 1764 = 1343^2 + 42^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805413 - 2⁵ = 1805381 is a prime.

It is a super-2 number, since 2×1805413² = 6519032201138, which contains 22 as substring.

1805413 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1805473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902706 + 902707.

It is an arithmetic number, because the mean of its divisors is an integer number (902707).

2^1805413 is an apocalyptic number.

It is an amenable number.

1805413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805413 is an equidigital number, since it uses as much as digits as its factorization.

1805413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1805413 is about 1343.6565781479. The cubic root of 1805413 is about 121.7658547715.

The spelling of 1805413 in words is "one million, eight hundred five thousand, four hundred thirteen".